* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  background-color: #000;
  overflow: hidden;
}

#holder {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

.box {
  position: absolute;
  width: 100%;
  height: 100%;
  margin: auto;
}

.box a {
  margin-top: 50px;
  margin-left: 100px;
  display: inline-block;
  text-decoration: none;
  color: #fff;
}